Homework Answers
| Alpha helices | beta sheet | beta turns | All |
|
First residue hydrogen bonded to 5th residue ( that is, residue n is h bonded to residue, n+4) All NH groups point same direction (The stable arrangement of alpha helices is possible due to the Hydrogen bond present after 4 residues away in an alpha helices.) |
successive R groups point in the opposite directions (This gives them a zig zag structure) |
first residue H bonded to the 4th residue( residue n is H bonded to residue n+3) (The main chain here has hydrogen bond between amino group and carbonyl group after 3 residues) |
contains -NH hydrogen bonded to C=O |
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Classify each phrase as a description of alpha helices, beta sheets, beta turns, or all. a...
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues....
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
Understand alpha helices and beta pleated sheets Question Which of the following statements is not true...
Understand alpha helices and beta pleated sheets Question Which of the following statements is not true about R groups in B-pleated sheet? a. The R groups of the peptide chain point outside. b. The R groups are attached to the carbons and extend above and below the folds of the pleat. c. The amino acids tend to have smaller R groups. Select the correct answer below: a and b a and c b and c only a FEEDBACK MORE INSTRUCTION...
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with b...
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with bulky side chains while the B-pleated sheets cannot? Select the correct answer below: O The R groups in the a-helix stabilize the structure, while they interfere with the hydrogen bonds in a B-pleated sheet. The R groups are contained inside the a-helix structure, while they interfere with the hydrogen bonds in a B- pleated sheet. O The R groups lie...
After going through all the activities, conclude your write up by addressing these two questions. A)interactions...
After going through all the activities, conclude your write up by addressing these two questions. A)interactions between what parts of the polypeptide chain are the most important for defining secondary structure? B) Do you think that all amino acid sequences would have the same propensity for forming helices and/or sheets? Why/why not? Activity 1:Thinking about Phi and Psi angles Make a four-residue peptide and switch atom numbering on. Can you identify the N-and C-termini? Activity 2–Playing with alpha-helices After resetting,...
27. Alpha-helices and beta pleated sheets represent which structural level of proteins? A. primary B. secondary...
27. Alpha-helices and beta pleated sheets represent which structural level of proteins? A. primary B. secondary C. tertiary D. elementary E basal 28. Which of the following is the first step in translation? A Small 40S ribosome subunit with initiation factors binds to the 5' cap of the mRNA and scans for the start codon. B. The RNA carrying Methionine binds to the P site and the large 60S subunit binds to form the complete ribosome. C. Elongation factors deliver...
2. Silk contains the repeating sequence (Gly-Ser-Gly-Ala-Gly-Ala)n. This sequence is present in beta strands that interact...
2. Silk contains the repeating sequence
(Gly-Ser-Gly-Ala-Gly-Ala)n. This sequence is present in beta
strands that interact with each other. Considering just a single
strand within a sheet, the Ser and Ala side chains will be
(on both sides of the sheet in a single repeat) (in first repeat,
on one side; in the next repeat on the other side) (the answer
depends on whether the strands are parallel or antiparallel) (on
the same side of the sheet).
4. The figure...
All of the following questions are in relation to the following journal article which is available...
All of the following questions are in relation to the following journal article which is available on Moodle: Parr CL, Magnus MC, Karlstad O, Holvik K, Lund-Blix NA, Jaugen M, et al. Vitamin A and D intake in pregnancy, infant supplementation and asthma development: the Norwegian Mother and Child Cohort. Am J Clin Nutr 2018:107:789-798 QUESTIONS: 1. State one hypothesis the author's proposed in the manuscript. 2. There is previous research that shows that adequate Vitamin A intake is required...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
Understand alpha helices and beta pleated sheets Question Every helical turn in an a-helix has 3.6 amino acid residues. Then, hydrogen bonds are formed between the oxygen atom in amino acid along the the carbonyl group in the first amino acid and the hydrogen atom in the amine group of the chain. Select the correct answer below: third second fourth fifth FEEDBACK MORE INSTRUCTION SUBMIT Content attribution
Understand alpha helices and beta pleated sheets Question Which of the following statements is not true about R groups in B-pleated sheet? a. The R groups of the peptide chain point outside. b. The R groups are attached to the carbons and extend above and below the folds of the pleat. c. The amino acids tend to have smaller R groups. Select the correct answer below: a and b a and c b and c only a FEEDBACK MORE INSTRUCTION...
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with bulky side chains while the B-pleated sheets cannot? Select the correct answer below: O The R groups in the a-helix stabilize the structure, while they interfere with the hydrogen bonds in a B-pleated sheet. The R groups are contained inside the a-helix structure, while they interfere with the hydrogen bonds in a B- pleated sheet. O The R groups lie...
27. Alpha-helices and beta pleated sheets represent which structural level of proteins? A. primary B. secondary C. tertiary D. elementary E basal 28. Which of the following is the first step in translation? A Small 40S ribosome subunit with initiation factors binds to the 5' cap of the mRNA and scans for the start codon. B. The RNA carrying Methionine binds to the P site and the large 60S subunit binds to form the complete ribosome. C. Elongation factors deliver...
2. Silk contains the repeating sequence
(Gly-Ser-Gly-Ala-Gly-Ala)n. This sequence is present in beta
strands that interact with each other. Considering just a single
strand within a sheet, the Ser and Ala side chains will be
(on both sides of the sheet in a single repeat) (in first repeat,
on one side; in the next repeat on the other side) (the answer
depends on whether the strands are parallel or antiparallel) (on
the same side of the sheet).
4. The figure...
All of the following questions are in relation to the following journal article which is available on Moodle: Parr CL, Magnus MC, Karlstad O, Holvik K, Lund-Blix NA, Jaugen M, et al. Vitamin A and D intake in pregnancy, infant supplementation and asthma development: the Norwegian Mother and Child Cohort. Am J Clin Nutr 2018:107:789-798 QUESTIONS: 1. State one hypothesis the author's proposed in the manuscript. 2. There is previous research that shows that adequate Vitamin A intake is required...
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